﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System;
using System.Collections.Generic;
using System.ComponentModel;

namespace Xceed.Silverlight.Data
{
  internal sealed class BufferDataHelper : ContextualGroupParentDataHelper, IContextHelper
  {
    #region Constructor

    internal BufferDataHelper(
      IContextualGroupDataHelper childDataHelper,
      GroupHandler groupHandler,
      SortingHandler sortHandler,
      FilteringHandler filterHandler,
      IEnumerable<SortDescription> primaryKeys )
      : base( childDataHelper )
    {
      if( groupHandler == null )
        throw new ArgumentNullException( "groupHandler" );

      if( sortHandler == null )
        throw new ArgumentNullException( "sortHandler" );

      if( filterHandler == null )
        throw new ArgumentNullException( "filterHandler" );

      if( primaryKeys == null )
        throw new ArgumentNullException( "primaryKeys" );

      m_groupHandler = groupHandler;
      m_sortHandler = sortHandler;
      m_filterHandler = filterHandler;
      m_primaryKeys = primaryKeys;
    }

    #endregion

    #region IContextHelper Members

    public DataSourceContext GetContext()
    {
      return new DataSourceContext(
        m_groupHandler,
        m_sortHandler,
        m_filterHandler,
        m_primaryKeys );
    }

    #endregion

    #region Private Fields

    private readonly GroupHandler m_groupHandler;
    private readonly SortingHandler m_sortHandler;
    private readonly FilteringHandler m_filterHandler;
    private readonly IEnumerable<SortDescription> m_primaryKeys;

    #endregion
  }
}
